Just changed my oil & filter...bets on whether it hesitates??
#1
Lexus Fanatic
Thread Starter
Just changed my oil & filter...bets on whether it hesitates??
So today I changed the oil on my LS. I installed a Toyota filter and used 5W20 synthetic. Last time I did this, I developed the hesitation/lack of throttle response. It went away about 2 weeks afterwards. I haven't driven the car yet today, but tomorrow on my commute I'll drive approx. 200 kms...most of it freeway.
I'll report back on whether the hesitation returns, which will once and for all, pin-point the link between the oil change service and the hesitation.
On another note, I am sending a sample of my oil to Blackstone Labs for analysis.
Fingers crossed.......
I'll report back on whether the hesitation returns, which will once and for all, pin-point the link between the oil change service and the hesitation.
On another note, I am sending a sample of my oil to Blackstone Labs for analysis.
Fingers crossed.......
#2
Just changed my oil & filter...bets on whether it hesitates??
I'll bet 10 doughnuts on NO.
The reason......now that you've had practice with the car you'll do a better job!
The reason......now that you've had practice with the car you'll do a better job!
#3
Lexus Fanatic
Thread Starter
I'll bet 10 doughnuts on NO.
WTF????!!!
#4
Did you by any chance reset the oil reminder. I wonder if it's the oil change or the reset.
#5
Lexus Fanatic
Thread Starter
Yes I reset the oil and the filter minder, but I don't see that as the issue, because it's just a time and mileage counter, not an oil sensor (right?).
#6
If the issue is due to the fresh oil then there might be a situation with the VVT that is oil pressure related. I know that our engine use a motor for the variable valve timing but there might be other mechanical parts that activate the valve lift duration that is oil pressure dependent like other Toyota engines.
We can speculate on any number of things but it may not be a bad idea to get a quality flush additive before your next oil change.
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#8
This could be a good or bad thing depending on how you look at it. The new synthetic will start to clean up those deposits and distribute them into some of the vital small passages necessary for lift engagement, then after the heavy cleaning has settled then it will subside again.
I have not studied the VVT system on the Lexus so its still heavy speculation on my part.
It could also be that the deposits are occluding some passages vital for lifter lubrication and causing noisy lifters which is being picked up by the mic on the knock sensor causing it to retard timing.
Ether way I think a long term cleaning with AutoRX and a short term flush with Motul or Amsoil oil flush is warranted.
Last edited by Devh; 08-13-14 at 11:40 AM.
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DrQuality (08-08-21)
#9
Driver School Candidate
I had the exact same issue 2 weeks ago after having the oil changed. Took it back in to the dealer along with a copy of TSIB L-SB-0033-08 which states:
Some vehicles may exhibit a hesitation on acceleration and in some cases set Diagnostic Trouble
Code (DTC) P2119 (Throttle Actuator Control Throttle Body Range/Performance). To enhance
the smoothness of acceleration the Engine Control Module/ECM (SAE term: Powertrain Control
Module/PCM) calibration has been revised.
So they reprogrammed the ECM (no cost) and it is like driving a new car. I had previously noticed hesitation from time to time since I bought the car 2 years ago but it was never so bad i looked into it. Wish I had done so a long time ago as it is now fun to drive. There are several other threads on here about this problem which pointed me to the TSIB. Good luck!
Some vehicles may exhibit a hesitation on acceleration and in some cases set Diagnostic Trouble
Code (DTC) P2119 (Throttle Actuator Control Throttle Body Range/Performance). To enhance
the smoothness of acceleration the Engine Control Module/ECM (SAE term: Powertrain Control
Module/PCM) calibration has been revised.
So they reprogrammed the ECM (no cost) and it is like driving a new car. I had previously noticed hesitation from time to time since I bought the car 2 years ago but it was never so bad i looked into it. Wish I had done so a long time ago as it is now fun to drive. There are several other threads on here about this problem which pointed me to the TSIB. Good luck!
Last edited by socampbell; 08-13-14 at 12:41 PM.
The following users liked this post:
DrQuality (08-08-21)
#10
I had the exact same issue 2 weeks ago after having the oil changed. Took it back in to the dealer along with a copy of TSIB L-SB-0033-08 which states:
Some vehicles may exhibit a hesitation on acceleration and in some cases set Diagnostic Trouble
Code (DTC) P2119 (Throttle Actuator Control Throttle Body Range/Performance). To enhance
the smoothness of acceleration the Engine Control Module/ECM (SAE term: Powertrain Control
Module/PCM) calibration has been revised.
So they reprogrammed the ECM (no cost) and it is like driving a new car. I had previously noticed hesitation from time to time since I bought the car 2 years ago but it was never so bad i looked into it. Wish I had done so a long time ago as it is now fun to drive. There are several other threads on here about this problem which pointed me to the TSIB. Good luck!
Some vehicles may exhibit a hesitation on acceleration and in some cases set Diagnostic Trouble
Code (DTC) P2119 (Throttle Actuator Control Throttle Body Range/Performance). To enhance
the smoothness of acceleration the Engine Control Module/ECM (SAE term: Powertrain Control
Module/PCM) calibration has been revised.
So they reprogrammed the ECM (no cost) and it is like driving a new car. I had previously noticed hesitation from time to time since I bought the car 2 years ago but it was never so bad i looked into it. Wish I had done so a long time ago as it is now fun to drive. There are several other threads on here about this problem which pointed me to the TSIB. Good luck!
There is some question in this thread about cam phasing on these engines. The intake cam is varied electrically and the exhaust cam is varied using oil pressure. I read that on shutdown, the intake cam is advanced to increase valve overlap which makes the engine easier for the starter to turn.
#11
Lexus Fanatic
Thread Starter
I am going to do that TSIB. This driveability issue is unnacceptable even if it's only for a few hundred miles. In fact, last time in went on for more like 700 miles.
#13
Lexus Fanatic
Thread Starter
#14
Did you want Dunkin or Krispy Kreme!
Yikes, I can't believe this happening to you guys. I have never experienced this in my car (knock on wood).
I guess you should have the TSIB done. I wouldn't think Dino oil would make difference ......... would it?
Yikes, I can't believe this happening to you guys. I have never experienced this in my car (knock on wood).
I guess you should have the TSIB done. I wouldn't think Dino oil would make difference ......... would it?